[Ips-dsgr] SWS Daily Report - 26 June 21 issued 2330 UT on 26 Jun 2021
Regional Warning Centre
rwc at ips.gov.au
Sun Jun 27 09:30:06 EST 2021
SUBJ: SWS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 2330UT/26 JUNE 2021 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
SUMMARY FOR 26 JUNE AND FORECAST FOR 27 JUNE - 29 JUNE
STATUS INDICATORS SOL:GREEN MAG:GREEN ION: GREEN
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1A. SOLAR SUMMARY
Activity 26 Jun: Very low
Flares: none.
Observed 10.7 cm flux/Equivalent Sunspot Number for 26 Jun: 82/23
1B. SOLAR FORECAST
27 Jun 28 Jun 29 Jun
Activity Very low to low Very low to low Very low to low
Fadeouts None expected None expected None expected
10.7cm/SSN 82/23 83/24 84/26
COMMENT: Solar activity was low on UT day 26 June, with only
weak B-class flares. Currently there is one numbered region on
the visible disk, AR 2835 (S18E51). No Earth-directed CMEs were
observed in the available coronagraph images. Solar activity
is expected to be very low on UT days 27-29 June. On 26 June,
the solar wind speed range 350-400 km/s, currently the speed
is near 350 km/s. The IMF (Bt) peaked at 6 nT and the north-south
IMF component (Bz) range was +5/-4 nT. The solar wind speed is
expected to be near its nominal levels on UT days 27-29 June.
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2A. MAGNETIC SUMMARY
Geomagnetic field for Australian Region 26 Jun: Quiet
Estimated Indices 26 Jun : A K
Australian Region 1 11111000
Cocos Island 1 10110000
Darwin 2 11111001
Townsville 1 11111000
Learmonth 1 11111000
Alice Springs 1 01111000
Gingin 2 11112100
Canberra 0 0001100-
Hobart 0 00011000
Estimated Antarctic Regional K Indices 26 Jun :
Macquarie Island 1 00022000
Casey 3 12211100
Mawson 3 12212100
Observed Regional daily pc3 Indices 26 Jun :
Darwin 0 (Quiet)
Townsville 0 (Quiet)
Learmonth 2 (Quiet)
Alice Springs 0 (Quiet)
Gingin 0 (Quiet)
Canberra 0 (Quiet)
Hobart 0 (Quiet)
Pc3 pulsations are high frequency (10-45 second period) variations
of the Earths magnetic field. Daily pc3-indices are the daily sum
of 20 minute pc3-indices for that station and have been shown to be
well correlated with rejection of high resolution aeromagnetic
survey flight-line data.
NOTE: Indices may have been generated from data obtained in
cooperation with the following organisations: Geoscience Australia,
University of Newcastle Space Physics Group, Australian Government
Antarctic Division and International Center for Space Weather
Science and Education, Japan.
Estimated AFr/Ap Indices 26 Jun : A
Fredericksburg 4
Planetary 5
Observed AFr/Ap Indices 25 Jun : A K
Fredericksburg 8
Planetary 9 4322 2122
2B. MAGNETIC FORECAST
Date Ap Conditions
27 Jun 5 Quiet
28 Jun 5 Quiet
29 Jun 5 Quiet
COMMENT: Geomagnetic conditions in the Australian and Antarctic
regions were quiet on UT day 26 June. Global geomagnetic conditions
are expected to be mostly quiet on UT days 27-29 June with isolated
unsettled period possible.
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3A. GLOBAL HF PROPAGATION SUMMARY
Latitude Band
Date Low Middle High
26 Jun Normal Normal Normal
PCA Event : No event.
3B. GLOBAL HF PROPAGATION FORECAST
Latitude Band
Date Low Middle High
27 Jun Normal Normal Normal
28 Jun Normal Normal Normal
29 Jun Normal Normal Normal
COMMENT: Mostly normal HF propagation conditions are expected
on UT days 27-29 June.
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4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
Date T index
26 Jun 13
Observed Australian Regional MUFs
Cocos Island Region:
No data.
Niue Island Region:
No data.
Northern Australian Region:
Near predicted monthly values.
Southern Australian Region:
Near predicted monthly values.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 30% over the UT day.
Monthly T index:
Month T index
May 13
Jun 22
Jul 24
4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
Date T index MUFs
27 Jun 15 Near predicted monthly values
28 Jun 15 Near predicted monthly values
29 Jun 15 Near predicted monthly values
COMMENT: MUFs in the Australian region on UT day 26 June were
mostly near predicted monthly values. MUFs are expected to be
near predicted monthly values on UT days 27-29 June.
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5. SPACE ENVIRONMENT SUMMARY
GOES satellite data for 25 Jun
Daily Proton Fluence >1 MeV: 5.4E+04
Daily Proton Fluence >10 MeV: 4.4E+04
Daily Electron Fluence >2 MeV: 2.50E+06 (normal fluence)
Electron Fluence Daily Deep Dielectric Discharge Probability: 1%
Fluence (flux accumulation over 24hrs)/ cm2-ster-day.
X-ray background: B1.0
DSCOVR Satellite Solar Wind Day Averaged Data for 25 Jun
Speed: 389 km/sec Density: 5.2 p/cc Temp: 142000 K Bz: 0 nT
(Courtesy Space Weather Prediction Center, Boulder USA)
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Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
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Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
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